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Ecological Intelligence

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Ecological Intelligence / Subject

aquaculture

Peer-reviewed Europe

Scottish aquaculture sites faced very different heatwave trajectories

Evidence
Peer-reviewed
Geography
Scotland's finfish and shellfish farm locations, United Kingdom
System
Coastal ocean / aquaculture climate exposure

WHAT THE EVIDENCE SAYS

Researchers sampled 1990–2025 daily satellite sea-surface temperatures at 361 farm locations represented by 218 grid cells, with in-situ checks at eight farms. Comparing 1990–2019 with 2020–2025, the two exposure groups showed estimated event-duration increases of 44.6% and 89.9%. Severe-or-extreme event probabilities increased far more steeply in one group, even as mean event intensity changed comparatively little.

WHY IT MATTERS / OUR READ

Regional warming maps can hide site-level risk profiles. Monitoring and adaptation decisions should distinguish heatwave frequency, persistence, cumulative heat and uncertainty at operating sites.

CAVEATS / UNCERTAINTY

Five-kilometer satellite data do not capture all farm-depth thermal exposures, and this is a hazard assessment, not measured mortality or economic loss at farms. The analysis is an accepted early-layout peer-reviewed article.

SOURCE

Frontiers in Marine Science — Toledo-Jaime et al. (2026)
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A satellite and farm-data analysis finds that increases in marine heatwave duration and severity were spatially uneven.

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Peer-reviewed Europe

A salmon supply chain made climate responsibility an institutional problem

Evidence
Peer-reviewed
Geography
United Kingdom, Norway and Scotland seafood supply-chain relationships
System
Aquaculture; corporate environmental governance; value chains

WHAT THE EVIDENCE SAYS

A qualitative international-business analysis published October 16 examines a multinational salmon supply chain in which a parent company and its British subsidiary coordinated suppliers operating under differing national institutions. The paper traces how reporting expectations and local practices shape work on indirect supply-chain emissions.

WHY IT MATTERS / OUR READ

Environmental ambition becomes measurable only when buyers, farms, reporting methods and verification systems can act together. A supplier code or climate target is not, by itself, a measured ecological outcome.

CAVEATS / UNCERTAINTY

Interview and documentary evidence describe governance and coordination; they do not independently verify actual emissions reductions, fish welfare improvements or additional conservation outcomes.

SOURCE

Management International Review · salmon supply-chain institutional study
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Interviews with a seafood company illuminate why Scope 3 action depends on the rules surrounding suppliers.

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Peer-reviewed North America

Small Alaska kelp farms did not create a detectable ‘new habitat’ signal

Evidence
Peer-reviewed
Geography
Southeast Alaska, USA
System
Nearshore kelp aquaculture

WHAT THE EVIDENCE SAYS

Researchers followed two commercial kelp farms and paired control sites for a year using fish eDNA, SCUBA macroinvertebrate surveys and abiotic measurements. Community composition varied strongly among locations, while farm-versus-control treatment effects were small and the farms did not support clearly unique assemblages.

WHY IT MATTERS / OUR READ

Aquaculture structures should not be assumed to create biodiversity benefit simply because they add three-dimensional habitat. The null-ish result is useful because it separates plausible mechanism from demonstrated ecological effect.

CAVEATS / UNCERTAINTY

This was a one-year study of two relatively small farms near Juneau. Power was limited for some comparisons and the result should not be generalized to larger farms, other coastlines, older installations or other ecosystem functions.

SOURCE

Annals of Botany
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At two Southeast Alaska commercial farms, eDNA and dive surveys found strong regional ecological variation but little evidence that the farms supported distinct fish or macroinvertebrate assemblages.

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